In this Sept. 8, 2016 photo, Obsidian Trail cuts through lava rock on the way to Obsidian Falls near Sisters, Ore. The Obsidian Trailhead provides access to the Pacific Crest Trail and to loop hikes of 10.6 and 15.8 miles that feature some of the most dramatic scenery Oregon has to offer. (Mark Morical/The Bulletin via AP)
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